JP2015525153A - Film containing functional ethylene polymer composition - Google Patents

Abstract

The present invention provides a coating comprising at least two layers, a first layer and a second layer, wherein the first layer is formed from a first composition comprising polyester, polylactic acid, or a combination thereof. The second layer is formed from a second composition comprising at least A) a functionalized ethylene-based polymer and B) an ethylene / alpha olefin interpolymer, the first layer being adjacent to the second layer. is doing. [Selection figure] None

Description

This application claims the benefit of US Provisional Patent Application No. 61 / 655,652, filed June 5, 2012.

  Polyethylene terephthalate (PET) is increasingly being used as a barrier material instead of nylon (PA) or EVOH or in combination with EVOH to reduce the total cost of the packaging structure. Generally, a structure such as PET / bonding layer / PE or PE / bonding layer / EVOH / bonding layer / PET is extruded into a 250-1250 micron film (see, eg, FIG. 1) for packaging applications. Thermoformed for. Such a coating structure can also be blown into a generally flexible packaging coating. Some conventional tie layer solutions include maleic anhydride modified ethylene methyl acrylate polymer and maleic anhydride modified ethylene vinyl acetate polymer. The essential requirements for tie layers are becoming more demanding and require higher adhesive properties. However, these current tie layer materials are often disadvantageous due to unpleasant taste and odor and / or insufficient thermal stability at high processing temperatures (≧ 225 ° C.). Accordingly, there is a need for new coating compositions containing tie layers with improved adhesion to polyester, good high temperature processability, and low taste and odor levels.

  US Pat. No. 6,027,776 describes: a) an inner layer of a homogeneous ethylene / alphaolefin copolymer having a density of about 0.89 to about 0.92 grams per cubic centimeter; and b) a polypropylene homopolymer or polypropylene. A first outer layer comprising a material selected from the group consisting of copolymers, polypropylene homopolymers or blends of polypropylene copolymers and elastomers, high density polyethylene, and copolyesters; and c) polyamides, copolyamides, polyesters, copolyesters, high A multilayer coating is disclosed that includes a second outer layer made of a material selected from the group consisting of density polyethylene, polypropylene, propylene / ethylene copolymer, and polycarbonate. A first adhesive layer is present between the inner layer and the first outer layer, and a second adhesive layer is present between the inner layer and the second outer layer.

  US Pat. No. 6,183,863 describes a modified ethylene / α-olefin copolymer obtained by graft modification of an unmodified linear ethylene / α-olefin copolymer with an unsaturated carboxylic acid or derivative thereof, or an unmodified Disclosed are adhesive ethylene copolymer resin blends of ethylene / α-olefin copolymers and modified ethylene / α-olefin copolymers, and olefin elastomers. Linear ethylene / α-olefin copolymers are prepared using an olefin polymerization catalyst comprising a Group 4 transition metal compound (a) containing a ligand having a cyclopentadienyl skeleton and an organoaluminum oxy compound. The adhesive ethylene copolymer composition can be used as a layer in a laminate with a polar material layer or a metal layer. The polar material can be an ethylene / vinyl alcohol copolymer, polyamide, or polyester. See also US Pat. No. 6,656,601.

  US Publication No. 2011/0297212 discloses a laminate coating having a substrate and an adhesive layer of ethylene polymer on one major surface of the substrate. The adhesive layer is disposed directly on the substrate, or there is a primer layer between the substrate and the adhesive layer.

  Additional coating compositions are described in: References: US Pat. Nos. 4,639,398, 5,837,358, 6,274,246, 6,663,974, US publication. No. 2002/0055006, No. 2007/0254118, No. 2008/0197540, No. 2008/0274328, No. 2008/0274314, No. 2010/0029827, International Publication No. 2008/079784, No. No. 2010/042334, No. 2010/042335, Reference Japanese Patents: Japanese Patent No. 10034836A (summary), No. 03-106647A (summary), No. 02551977B2 (summary), No. 0307557B2 (Summary), 7103278B2 (Summary), 64-04545 (Summary) The No. 2009-019063 (Abstract), the No. 01-317756 (Abstract), the No. 06-126882 (Abstract), Reference publications: De Gooijer, J. M.M. Scheltus, M .; and Koning, C.I. E. Polym. Eng. Sci. 41, 2001, 86-94, Pietrasanta, Y. et al. Robin, J .; J. et al. Torres, N .; Boutevin, B .; Macromol. Chem. Phys. 200, 1999, 142-149, Becker, P.M. and Kiang, W .; ANTEC, 1991, 1389-94, and Durgun, H; Bayram, G .; J. et al. Adhesion Sci. Technol. 19, 2005, 407-425.

  However, as noted above, there remains a need for new multilayer coating compositions containing tie layer compositions with improved adhesion to polyester. These needs and others have been met by the following invention.

The present invention is a coating comprising at least two layers, a first layer and a second layer,
The first layer is formed from a first composition comprising polyester, polylactic acid, or a combination thereof;
The second layer comprises at least A) a functionalized ethylene-based polymer,
B) an ethylene / alphaolefin interpolymer and formed from a second composition,
The first layer provides a coating that is adjacent to the second layer.

Represents a multilayer coating comprising an outer layer, a barrier layer, a sealing layer, and a bonding layer. 1 represents a “PET-bonding layer” sandwich structure used to test the adhesion of a bonding layer to PET. Represents the test setting for "90 degree peel adhesion".

As described above, the present invention is a film including at least two layers of a first layer and a second layer,
The first layer is formed from a first composition comprising polyester, polylactic acid (PLA), or a combination thereof;
The second layer comprises at least A) a functionalized ethylene-based polymer,
B) an ethylene / alphaolefin interpolymer and formed from a second composition,
The first layer provides a coating that is adjacent to the second layer.

  A coating according to the present invention may comprise a combination of two or more embodiments described herein.

  In one embodiment, the second composition comprises 80 weight percent or less of the functionalized ethylene-based polymer of Component A, based on the combined weight of Component A and Component B.

  In one embodiment, the second composition comprises 60 weight percent or less of the functionalized ethylene-based polymer of Component A, based on the combined weight of Component A and Component B.

  In one embodiment, the second composition comprises 50 weight percent or less of the functionalized ethylene-based polymer of Component A, based on the combined weight of Component A and Component B.

  In one embodiment, the second composition comprises 40 weight percent or less of the functionalized ethylene-based polymer of Component A, based on the total weight of Component A and Component B.

  In one embodiment, the second composition comprises 30 weight percent or less of the functionalized ethylene-based polymer of Component A, based on the combined weight of Component A and Component B.

  In one embodiment, the second composition comprises 10 weight percent or more of the functionalized ethylene-based polymer of Component A, based on the combined weight of Component A and Component B.

  In one embodiment, the second composition comprises 20 weight percent or more of the functionalized ethylene-based polymer of Component A, based on the combined weight of Component A and Component B.

  In one embodiment, the second composition comprises 10 to 80 weight percent, or even 10 to 60 weight percent, or even 10 to 30 weight percent functionalization of component A, based on the total weight of component A and component B. Contains ethylene polymers.

  In one embodiment, the second composition is a functionalized component A of 10 to 50 weight percent, further 10 to 40 weight percent, or even 10 to 30 weight percent, based on the total weight of component A and component B. Contains ethylene polymers.

  In one embodiment, the weight ratio of component B to component A is 99: 1 to 10:90, even 99: 1 to 40:60, even 99: 1 to 50:50.

  In one embodiment, the weight ratio of component B to component A is 9-2 / 3.

  In one embodiment, the weight ratio of component B to component A is 9-1.

  In one embodiment, the weight ratio of component B to component A is 4-1.

  In one embodiment, the second composition comprises 80 weight percent or less of the functionalized ethylene-based polymer of component A, based on the weight of the second composition.

  In one embodiment, the second composition comprises 60 weight percent or less of the functionalized ethylene-based polymer of component A, based on the weight of the second composition.

  In one embodiment, the second composition comprises 50 weight percent or less of the functionalized ethylene-based polymer of component A, based on the weight of the second composition.

  In one embodiment, the second composition comprises 40 weight percent or less of the functionalized ethylene-based polymer of component A, based on the weight of the second composition.

  In one embodiment, the second composition comprises 30 weight percent or less of the functionalized ethylene-based polymer of component A, based on the weight of the second composition.

  In one embodiment, the second composition comprises 10 weight percent or more of the functionalized ethylene-based polymer of Component A, based on the weight of the second composition.

  In one embodiment, the second composition comprises 20 weight percent or more of the functionalized ethylene-based polymer of component A, based on the weight of the second composition.

  In one embodiment, the second composition is 10 to 80 weight percent, further 10 to 60 weight percent, or even 10 to 30 weight percent functionalized ethylene of component A, based on the weight of the second composition. System polymers.

  In one embodiment, the second composition is 10 to 50 weight percent, further 10 to 40 weight percent, or even 10 to 30 weight percent functionalized ethylene of component A, based on the weight of the second composition. System polymers.

  In one embodiment, the second composition comprises 90 weight percent or more of the “total weight of components A and B” based on the weight of the second composition.

  In one embodiment, the second composition comprises 95 weight percent or more of the “total weight of components A and B” based on the weight of the second composition.

  In one embodiment, the second composition comprises 98 weight percent or more of the “total weight of components A and B” based on the weight of the second composition.

  In one embodiment, the second composition has a melt index (I2) of 2-10, even 3-8, or even 4-6 g / 10 min.

In one embodiment, the second composition has a density of 0.860 to 0.930 g / cc, even 0.870 to 0.920 g / cc (1 cc = 1 cm ³ ).

  In one embodiment, the second composition comprises less than 0.5 weight percent, preferably less than 0.1 weight percent, more preferably less than 0.05 weight percent ethylene vinyl acetate polymer (EVA).

  In one embodiment, the second composition does not include an ethylene vinyl acetate polymer (EVA).

  The second composition can comprise a combination of two or more embodiments, as described herein.

  In one embodiment, the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alpha olefin interpolymer. In a further embodiment, the functionalized ethylene-based polymer is a functionalized ethylene-based homopolymer. In another embodiment, the functionalized ethylene-based polymer is a functionalized ethylene / alpha olefin interpolymer and even a functionalized ethylene / alpha olefin copolymer.

  In one embodiment, the functionalized ethylene-based polymer that is Component A comprises COOH groups and / or anhydride groups.

  In one embodiment, Component A, the functionalized ethylene-based polymer has a density of 0.870 to 0.950 g / cc.

  In one embodiment, the functionalized ethylene-based polymer that is Component A has a melt index (I2: 2.16 kg) of 0.5 g / 10 min to 5.0 g / 10 min, or even 1 g / 10 min to 3 g / 10 min. / 190 ° C).

  In one embodiment, the functionalized ethylene-based polymer that is Component A includes units derived from ethylene and maleic anhydride and / or maleic acid.

  In one embodiment, the functionalized ethylene-based polymer is a MAH grafted ethylene-based polymer. In further embodiments, the MAH grafted ethylene-based polymer has a melt index (I2) of 0.5-10 g / 10 min, or 1-6 g / 10 min.

  In one embodiment, the functionalized ethylene-based polymer is a MAH grafted ethylene-based polymer. In one embodiment, the MAH grafted ethylene-based polymer has a MAH graft level that is 0.05 to 1.20 weight percent, based on the weight of the second composition. In a further embodiment, the MAH grafted ethylene-based polymer has a MAH graft level that is 0.07 to 1.00 weight percent, based on the weight of the second composition. In a further embodiment, the MAH grafted ethylene-based polymer has a MAH graft level that is 0.10 to 0.60 weight percent, based on the weight of the second composition.

  In one embodiment, the functionalized ethylene-based polymer is a MAH grafted ethylene-based polymer. In one embodiment, the MAH grafted ethylene-based polymer has a MAH graft level that is 0.05 to 1.20 weight percent, based on the combined weight of components A and B. In a further embodiment, the MAH grafted ethylene-based polymer has a MAH graft level that is 0.07 to 1.00 weight percent, based on the combined weight of components A and B. In a further embodiment, the MAH grafted ethylene-based polymer has a MAH graft level that is 0.10 to 0.60 weight percent, based on the total weight of components A and B.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a density of less than 0.93 g / cc. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a density of 0.92 g / cc or less. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a density of 0.90 g / cc or less. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a density of 0.89 g / cc or less. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a melting point (Tm) of less than 130 ° C. as determined by DSC.
In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a melting point (Tm) of less than 100 ° C. as determined by DSC. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a melting point (Tm) of less than 85 ° C. as determined by DSC. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the ethylene / alpha olefin interpolymer of component B (second composition) has a melting point (Tm) of less than 75 ° C. as determined by DSC. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the α-olefin of the ethylene / α-olefin interpolymer that is Component B is a C3-C10 α-olefin. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, Component B, the ethylene / α-olefin interpolymer, has a melt index (I2) of 0.1 g / 10 min or greater, or 0.5 g / 10 min or greater, or 1.0 g / 10 min or greater. Have. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, Component B, the ethylene / α-olefin interpolymer, has a melt index (I2) of 50 g / 10 min or less, or 20 g / 10 min or less, or 10 g / 10 min or less. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, Component B, the ethylene / α-olefin interpolymer, has a melt index (I 2 of 0.1-50 g / 10 min, or 0.5-20 g / 10 min, or 1.0-10 g / 10. ). In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the second composition further comprises C) an ethylene / alpha olefin interpolymer having a melt viscosity at 350 ° F. of 50,000 cP or less and even 350 ° C. of 30,000 cP or less. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, Component C, the ethylene / alpha olefin interpolymer, has a density of 0.90 g / cc or less, further 0.89 g / cc or less, even 0.88 g / cc or less. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, Component C, the ethylene / alpha olefin interpolymer, has a density of 0.85 g / cc or higher, more preferably 0.86 g / cc or higher, even 0.87 g / cc or higher. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, the alpha olefin of component C, the ethylene / alpha olefin interpolymer, is a C3-C10 alpha olefin and is further selected from propylene, 1-butene, 1-hexene, and 1-octene. In a further embodiment, the ethylene / alpha olefin interpolymer is an ethylene / alpha olefin copolymer.

  In one embodiment, Component C, the ethylene / alpha olefin interpolymer, and even the ethylene / alpha olefin copolymer is present in an amount of 5 to 20 weight percent, based on the weight of the second composition. In a further embodiment, the second composition comprises 40-50 weight percent functionalized ethylene-based polymer, based on the weight of the second composition.

  Component C, the ethylene / alpha olefin interpolymer, as well as the ethylene / alpha olefin copolymer, may comprise a combination of two or more embodiments, as described herein.

  In one embodiment, the second composition further comprises one or more additives. In further embodiments, the one or more additives are selected from antioxidants, excipients, or combinations thereof.

  The second composition can comprise a combination of two or more embodiments, as described herein.

  The functionalized ethylene-based polymer that is Component B may comprise a combination of two or more embodiments as described herein.

  Component B, the ethylene / α-olefin interpolymer, may comprise a combination of two or more embodiments, as described herein.

  In one embodiment, the first composition comprises 40 weight percent or more of polyester, PLA, or a combination thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 50 weight percent or more of polyester, PLA, or combinations thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 60 weight percent or more of polyester, PLA, or a combination thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 70 weight percent or more of polyester, PLA, or combinations thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 80 weight percent or more of polyester, PLA, or combinations thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 90 weight percent or more of polyester, PLA, or combinations thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 95 weight percent or more of polyester, PLA, or combinations thereof, based on the weight of the first composition.

  In one embodiment, the first composition comprises 98 weight percent or more of polyester, PLA, or combinations thereof, based on the weight of the first composition.

  In one embodiment, the first composition includes a polyester.

  In one embodiment, the first composition comprises 40 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 50 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 60 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 70 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 80 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 90 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 95 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the first composition comprises 98 weight percent or more polyester based on the weight of the first composition.

  In one embodiment, the polyester has a melting temperature determined by DSC of greater than 230 ° C, even greater than 240 ° C.

  Examples of polyesters include, but are not limited to, PET (polyethylene terephthalate), PBT (polybutylene terephthalate), and other similar polymers.

  In one embodiment, the first composition further comprises one or more additives. In further embodiments, the one or more additives are selected from antioxidants, excipients, or combinations thereof.

  The first composition can include a combination of two or more embodiments, as described herein.

  In one embodiment, for the coating according to the invention, the thickness ratio of the first layer to the second layer is 0.70 to 0.99.

  In one embodiment, the coating includes a third layer formed from a composition comprising EVOH, polyamide, or a combination thereof.

  In one embodiment, the coating according to the invention comprises less than 0.5 weight percent, preferably less than 0.1 weight percent, more preferably less than 0.05 weight percent LDPE (high pressure free radical polymerized). including.

  In one embodiment, the coating according to the present invention does not contain LDPE (high pressure free radical polymerized).

  In one embodiment, the coating according to the present invention comprises less than 0.5 weight percent tackifier, preferably less than 0.1 weight percent, more preferably less than 0.05 weight percent.

  In one embodiment, the coating according to the present invention does not contain a tackifier.

  In one embodiment, the first layer and the second layer together comprise 10-50 percent, even 15-50 percent, or even 20-50 weight percent of the total film thickness.

  A coating according to the present invention may comprise a combination of two or more embodiments, as described herein.

  The term “film” as used herein means both film and sheet, and generally according to the present invention has a thickness of 50 microns or more. The coating generally includes multiple layers.

  The present invention also provides an article comprising a coating according to the present invention as described herein.

  An article according to the present invention may comprise a combination of two or more embodiments as described herein.

Ethylene / α-olefin interpolymer (component B-second composition)
Ethylene / α-olefin interpolymers include, but are not limited to, polymers formed by polymerizing ethylene with one or more, preferably one, C3-C10 α-olefin (s). Exemplary α-olefins include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, and 1-decene. . Suitably the α-olefin is propylene, 1-butene, 1-hexene or 1-octene. Preferred copolymers include ethylene / propylene (EP) copolymers, ethylene / butene (EB) copolymers, ethylene / hexene (EH) copolymers, ethylene / octene (EO) copolymers.

  Commercial examples of suitable ethylene / α-olefin interpolymers include ENGAGE Polyolefin Elastomers available from The Dow Chemical Company, EXCEED and EXACT polymers available from ExxonMobil Chemical Company, and META TA Including but not limited to polymers.

  In one embodiment, the ethylene / α-olefin interpolymer has a melting point (Tm) determined by DSC of greater than 40 ° C., or greater than 45 ° C., or greater than 50 ° C. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a melting point (Tm) determined by DSC of less than 130 ° C, or less than 100 ° C, or less than 85 ° C. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a percent crystallinity as measured by DSC of 40 percent or less, or 35 percent or less, or 30 percent or less, or 25 percent or less, or 15 percent or less. . In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a percent crystallinity as measured by DSC of 2 percent or greater, or 5 percent or greater, or 8 percent or greater. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a density of 0.850 g / cc or higher, or 0.855 g / cc or higher, or 0.860 g / cc or higher. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a density of 0.920 g / cc or less, or 0.910 g / cc or less, or 0.900 g / cc or less. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a melt index (I2) greater than 0.1 g / 10 minutes, or greater than 0.5 g / 10 minutes, or greater than 1.0 g / 10 minutes. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a melt index (I2) of 100 g / 10 min or less, or 50 g / 10 min or less, or 20 g / 10 min or less, or 10 g / 10 min or less. In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a molecular weight distribution (Mw / Mn) determined by GPC of 1.1 or higher, or 1.2 to or higher, or 1.5 or higher, or 1.7 or higher. ). In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer has a molecular weight distribution determined by GPC (Mw / Mn) of 4.0 or less, or 3.5 to or less, or 2.5 or less, or 2.1 or less. ). In a further embodiment, the ethylene / α-olefin interpolymer is an ethylene / α-olefin copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer is a homogeneously branched linear interpolymer, preferably a copolymer, or a homogeneously branched substantially linear interpolymer, preferably a copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer is a homogeneously branched substantially linear interpolymer, preferably a copolymer.

  In one embodiment, the ethylene / α-olefin interpolymer is a homogeneous branched linear interpolymer, preferably a copolymer.

  The terms “homogeneous” and “homogeneously branched” mean that the α-olefin comonomer is randomly distributed within a defined polymer molecule, and all polymer molecules have the same or substantially the same comonomer to ethylene ratio, Used for ethylene / α-olefin interpolymers.

  Homogeneously branched linear ethylene interpolymers lack long chain branches, but have short chain branches derived from comonomers polymerized to the interpolymer, with the same polymer chain and with different polymer chains. An ethylene polymer that is homogeneously distributed between. These ethylene / α-olefin interpolymers have a linear polymer backbone, no measurable long chain branches, and a narrow molecular weight distribution. This class of polymers is disclosed, for example, in US Pat. No. 3,645,992 by Elston, and subsequent processes for producing such polymers using bismetallocene catalysts are described, for example, in European Patent No. EP 0 129 368. EP 0 260 999, US Pat. No. 4,701,432, US Pat. No. 4,937,301, US Pat. No. 4,935,397, US Pat. No. 5,055,438, and It has been developed as shown in WO 90/07526, each incorporated herein by reference. As explained, homogeneously branched linear ethylene interpolymers lack long chain branching, as is the case with linear low density polyethylene or linear high density polyethylene polymers. Commercial examples of homogeneously branched linear ethylene / α-olefin interpolymers include TAFMER polymers from Mitsui Chemical Company, and EXACT and EXCEED polymers from ExxonMobil Chemical Company.

  Homogeneously branched substantially linear ethylene / α-olefin interpolymers are described in US Pat. Nos. 5,272,236, 5,278,272, 6,054,544, 335,410, and 6,723,810, each incorporated herein by reference. The substantially linear ethylene / α-olefin interpolymer has long chain branches. Long chain branches have the same comonomer distribution as the polymer backbone and may have approximately the same length as the polymer backbone. “Substantially linear” generally relates to polymers that, on average, are substituted with “0.01 long chain branches per 1000 carbons” to “3 long chain branches per 1000 carbons”. The length of the long chain branch is longer than the length of the short chain branch carbon formed by incorporating one comonomer into the polymer backbone.

  Substantially linear ethylene / α-olefin interpolymers form a unique class of homogeneously branched ethylene polymers. They are substantially different from the known class of conventional homogeneously branched linear ethylene / α-olefin interpolymers, as described above, and they are further different from the conventional heterogeneous “Ziegler-Zieger” Natta-catalyzed polymerized "linear ethylene polymers (eg, ultra low density polyethylene (ULDPE), linear low density, made using the technique disclosed by Anderson et al. In US Pat. No. 4,076,698. Polyethylene (LLDPE), or high density polyethylene (HDPE)) if not the same grade, such as low density polyethylene (LDPE), ethylene-acrylic acid (EAA) copolymer, and ethylene vinyl acetate (EVA) copolymer, Highly branched polyethylene initiated by high pressure and free radicals Not even in the same grade.

  The homogeneously branched, substantially linear ethylene / α-olefin interpolymers useful in the present invention have excellent processability despite having a relatively narrow molecular weight distribution. Surprisingly, the melt flow ratio (I10 / I2) of substantially linear ethylene interpolymers based on ASTM D1238 can vary greatly and essentially independently of the molecular weight distribution (Mw / Mn or MWD). This surprising property is found in conventional homogeneously branched linear ethylene interpolymers, such as those described by Elston in US Pat. No. 3,645,992, and, for example, by Anderson et al. In contrast to conventional “Ziegler-Natta polymerized” linear polyethylene interpolymers that are heterogeneously branched, such as those described in US Pat. No. 076,698. Unlike substantially linear ethylene interpolymers, linear ethylene interpolymers (whether homogeneously branched or heterogeneously branched) also increase their I10 / I2 values as the molecular weight distribution increases. It has rheological properties.

  Long chain branching can be determined by using 13C nuclear magnetic resonance (NMR) spectroscopy, the disclosure of which is incorporated herein by reference, Randall (Rev. Macromol. Chem. Phys., C29 (2 & 3 ), 1989, p. 285-297). Two other methods are gel permeation chromatography combined with a low angle laser light scattering detector (GPCLALLS) and gel permeation chromatography combined with a differential viscosity detector (GPC-DV). The use of these techniques for the detection of long chain branches, and the underlying theory is well documented in the literature. For example, Zimm, B.M. H. and Stockmayer, W .; H. , J .; Chem. Phys. 17, 1301 (1949) and Rudin, A. et al. , Modern Methods of Polymer Charactorization, John Wiley & Sons, New York (1991) pp. 199 See 103-112.

  In contrast to “substantially linear ethylene polymer”, “linear ethylene polymer” means that the polymer lacks measurable or demonstrable long chain branches, ie, the polymer averages 0.01 per 1000 carbons. It is meant to be substituted with the following long chain branches:

  The ethylene / α-olefin interpolymer may comprise a combination of two or more embodiments as described herein.

  The ethylene / α-olefin copolymer may comprise a combination of two or more embodiments, as described herein.

Functionalized ethylene polymer (component A-second composition)
The term “functionalized ethylene-based polymer” as used herein refers to an ethylene containing at least one chemical group (chemical substituent) that is linked by a covalent bond and whose group contains at least one heteroatom. This means a polymer. A heteroatom is defined as an atom that is not carbon or hydrogen. Common heteroatoms include, but are not limited to oxygen, nitrogen, sulfur, and phosphorus.

  Some examples of compounds that can be grafted onto the ethylene-based polymer include ethylenically unsaturated carboxylic acids and acid derivatives such as esters, anhydrides, and acid salts. Examples include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, citraconic acid, maleic anhydride, tetrahydrophthalic anhydride, norborn-5-ene-2,3-dicarboxylic anhydride, nadic anhydride Products, hymic acid anhydrides, and mixtures thereof. Maleic anhydride is a preferred compound.

In one embodiment, the functionalized ethylene-based polymer is
, An anhydride, and combinations thereof, wherein R is hydrogen or alkyl, and R ′ is hydrogen or alkyl. In further embodiments, each alkyl group is independently methyl, ethyl, propyl or butyl. In one embodiment, the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alpha olefin interpolymer. In a further embodiment, the functionalized ethylene-based polymer is a functionalized ethylene homopolymer. In another embodiment, the functionalized ethylene-based polymer is a functionalized ethylene / alpha olefin interpolymer, as well as a functionalized ethylene / alpha olefin copolymer.

  In one embodiment, the functionalized ethylene-based polymer includes at least one anhydride group and even at least one maleic anhydride group. In one embodiment, the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alpha olefin interpolymer. In a further embodiment, the functionalized ethylene-based polymer is a functionalized ethylene homopolymer. In another embodiment, the functionalized ethylene-based polymer is a functionalized ethylene / alpha olefin interpolymer, as well as a functionalized ethylene / alpha olefin copolymer.

  In one embodiment, the functionalized ethylene-based polymer is a maleic anhydride grafted polymer. In one embodiment, the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alpha olefin interpolymer. In a further embodiment, the functionalized ethylene-based polymer is a functionalized ethylene homopolymer. In another embodiment, the functionalized ethylene-based polymer is a functionalized ethylene / alpha olefin interpolymer, as well as a functionalized ethylene / alpha olefin copolymer.

  In one embodiment, the functionalized ethylene-based polymer has a density of 0.86 to 0.96 g / cc, even 0.87 to 0.94 g / cc, even 0.87 to 0.92 g / cc. In one embodiment, the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alpha olefin interpolymer. In a further embodiment, the functionalized ethylene-based polymer is a functionalized ethylene homopolymer. In another embodiment, the functionalized ethylene-based polymer is a functionalized ethylene / alpha olefin interpolymer, as well as a functionalized ethylene / alpha olefin copolymer.

  In one embodiment, the functionalized ethylene-based polymer melts from 0.1 g / 10 min to 50 g / 10 min, or from 0.5 g / 10 min to 20 g / 10 min, or from 1.0 g / 10 min to 10 g / 10 min. It has an index (I2: 2.16 kg / 190 ° C.). In one embodiment, the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alpha olefin interpolymer. In a further embodiment, the functionalized ethylene-based polymer is a functionalized ethylene homopolymer. In another embodiment, the functionalized ethylene-based polymer is a functionalized ethylene / alpha olefin interpolymer, as well as a functionalized ethylene / alpha olefin copolymer.

  Suitable commercially functionalized olefinic polymers include AMPLIFY GR Functional Polymers available from The Dow Chemical Company.

  A functionalized ethylene-based polymer can comprise a combination of two or more embodiments, as described herein.

  A functionalized ethylene homopolymer may comprise a combination of two or more embodiments, as described herein.

  The functionalized ethylene / alpha olefin interpolymer may comprise a combination of two or more embodiments, as described herein.

  The functionalized ethylene / alpha olefin copolymer may comprise a combination of two or more embodiments, as described herein.

Additives In one embodiment, the polymer composition (eg, the first composition and / or the second composition) includes at least one additive. Suitable additives include but are not limited to antioxidants, UV stabilizers, foaming agents, flame retardants, colorants or pigments, and combinations thereof.

  In one embodiment, the composition includes at least one excipient. In further embodiments, the excipient is selected from carbon black, talc, calcium carbonate, clay, or combinations thereof. In one embodiment, the excipient is present in an amount of 70 weight percent or less, or 50 weight percent or less, or 30 weight percent or less, based on the weight of the composition. In one embodiment, the excipient is present in an amount of 2 weight percent or more, or 5 weight percent or more, or 10 weight percent or more, based on the weight of the composition.

Applications The present invention also provides an article comprising at least one component formed from a coating according to the present invention. Articles include, but are not limited to, coextruded films and sheets, packaging films, thermoformed trays, shrink bags and lid films, and laminated films.

  The composition can be formed into a finished article by any one of conventional processes and equipment. Exemplary processes include, but are not limited to, extrusion, coextrusion, calendering, injection molding, compression molding, lamination, microlayer coextrusion, blow molding, and other typical processes well known in the art. Not exclusively.

Definitions Unless stated to the contrary, implied by context, or customary in the art, all parts and percentages are based on weight and all test methods are based on the filing date of this disclosure. Is up to date.

  The term “composition”, as used herein, means a mixture of materials that make up the composition and reaction products and degradation products formed from the materials of the composition.

  The term “polymer” as used herein means a polymeric compound prepared by polymerizing monomers, whether of the same type or different types. The generic term “polymer” therefore means the term “homopolymer” (with the understanding that trace impurities can be incorporated into the polymer structure, to mean a polymer prepared with only one type of monomer. And the term “interpolymer” as defined below. For example, trace impurities such as catalyst residues can be incorporated into the polymer structure and / or into the bulk polymer.

  The term “interpolymer” as used herein means a polymer prepared by the polymerization of at least two different types of monomers. The generic term “interpolymer” thus refers to copolymers (taken to mean polymers prepared from two different types of monomers), and polymers prepared from three or more different types of monomers. Including.

  The term “olefinic polymer” as used herein includes a majority amount of an olefin monomer (based on the weight of the polymer), such as ethylene or propylene, in polymerized form, optionally one or more. Means a polymer that may contain

  The term “ethylene-based polymer” as used herein includes, in polymerized form, a majority amount of ethylene monomer (based on the weight of the polymer), and may optionally include one or more comonomers. Means polymer.

  The term “ethylene / α-olefin interpolymer” as used herein, in polymerized form, comprises a majority amount of ethylene monomer (based on the weight of the interpolymer), and an α-olefin. Means polymer.

  The term “ethylene / α-olefin copolymer” as used herein, in polymerized form, converts a majority amount of ethylene monomer (based on the weight of the copolymer), and α-olefin into only two It means a copolymer, including as a monomer type.

  The term “propylene-based polymer” as used herein includes, in polymerized form, a majority amount of propylene monomer (based on the weight of the polymer) and may optionally include one or more comonomers. Means polymer.

  The terms “comprising”, “including”, “having”, and derivatives thereof, specifically disclose the presence of any additional component, step, or procedure. It is not intended to be excluded, whether or not it has been done. To avoid any doubt, all compositions claimed through the use of the term “comprising” are optional additions, whether or not polymeric, unless stated to the contrary. Additive, adjuvant, or compound. In contrast, the term “consisting essentially of” excludes any other component, step, or procedure from the scope of any subsequent description, except those that are not essential to the feasibility. The term “consisting of” excludes any component, step or procedure not specifically described or described.

Test Method Determination of Maleic Anhydride (MAH) Content—Functionalized Ethylene Polymer and Second Composition Calibration: Maleic anhydride content was measured as follows. Contains a dry resin sample (1-2 grams, functionalized polymer, or MAH functionalized ethylene-based polymer and ethylene / α-olefin interpolymer (composition stabilized with generally ppm amount of another stabilizer) The composition was dissolved in 150 ml of xylene by heating to 100 ° C. while stirring the sample on a stirred hot plate. Once dissolved, the sample was titrated while hot with “1:25 toluene / methanol tetrabutylammonium hydroxide (TBAOH)” using 10 drops of bromothymol blue as an indicator. The end point was recorded when the solution turned blue.

FTIR: FTIR spectra were used to determine g-MAH levels in each sample using the method calibrated for TBAOH titration analysis described above. The weight percent of g-MAH is calculated as ca. From the ratio of the peak height at 1790 cm ⁻¹ to the height of 2751 cm ⁻¹ , it was determined as follows.

Melt Index Melt index (I2) was measured according to ASTM D-1238 (190 ° C., 2.16 kg). Results were reported in grams / 10 minutes. Melt flow rate (MFR) was measured according to ASTM D-1238 (230 ° C., 2.16 kg). Results were reported in grams / 10 minutes.

Density Density was measured according to ASTM D-792.

Gel permeation chromatography (GPC)
Conventional GPC measurement methods are used to determine the weight average molecular weight (Mw) and number average molecular weight (Mn) of the polymer and to determine the MWD (= Mw / Mn). “Samples are analyzed using a high temperature GPC instrument (Polymer Laboratories, Inc. Model PL220).

  This method employs a known and universal calibration method based on the concept of hydrodynamic volume, which uses a narrow polystyrene (PS) standard and four Mixed A 20 μm columns (Agilent) operating at a system temperature of 140 ° C. (PLgel Mixed A manufactured by (original Polymer Laboratory Inc.)). Samples are prepared in 1,2,4-trichlorobenzene solvent at a “2 mg / mL” concentration. The flow rate is 1.0 mL / min and the injection size is 100 microliters.

As explained, the determination of molecular weight is estimated by using a polystyrene standard (Polymer Laboratories) with a narrow molecular weight distribution in combination with its elution volume. Equivalent polyethylene molecular weights use the appropriate Mark-Houwink coefficients for polyethylene and polystyrene (explained by Williams and Ward in Journal of Polymer Science, Polymer Letters, Vol. 6, (621) 1968) and use the following equation: Determined by deriving.
M polyethylene = a * (M polystyrene) ^b
In this formula, a = 0.4316 and b = 1.0. The weight average molecular weight (Mw) and the number average molecular weight (Mn) are each calculated by a normal method. For example, Mw is calculated by the equation: Mw = ΣwiMi, where wi and Mi are the weight fraction and molecular weight of the i-th fraction eluted from the GPC column, respectively.

Differential scanning calorimetry (DSC)
Differential scanning calorimetry (DSC) is used to measure crystallinity in polymers (eg, ethylene-based (PE) polymers). About 5-8 mg of polymer sample is weighed and placed in the DSC pan. Crimp the lid on the pan to ensure sealed air. The sample pan is placed in the DSC cell and then heated at a rate of approximately 10 ° C./min to a temperature of 180 ° C. for PE (230 ° C. for PP). The sample is kept at this temperature for 3 minutes. The sample is then cooled at a rate of 10 ° C./min to −60 ° C. for PE (−40 ° C. for PP) and kept isothermal for 3 minutes at that temperature. The sample is then heated at a rate of 10 ° C./min until completely melted (second heating). The percent crystallinity is the heat of fusion determined from the second heating curve (H _f ) divided by the theoretical heat of fusion of 292 J / g for PE (165 J / g for PP), This quantity is determined by multiplying by 100 (for example, crystallinity% = (H _f ÷ 292 J / g) × 100 (for PE)).

Unless otherwise specified, the melting point (s) (T _m ) of each polymer is determined from the second heating curve (peak Tm) and the crystallization temperature (T _c ) is the first cooling curve (peak Tc). Determined from.

Melt viscosity Melt viscosity is measured using a Brookfield Digital Viscometer (model DV-II +, version 3) and a disposable aluminum sample chamber according to ASTM D3236 (350 ° F.). The spindle used is generally a “SC-31 hot melt spindle” suitable for measuring viscosities in the range of 10 to 100,000 centipoise. The sample is poured into the chamber and this time the chamber is inserted into a Brookfield Thermosel and locked in place. The sample chamber has a notch that matches the bottom of the Brookfield Thermosel at the bottom to ensure that the chamber orientation does not change when the spindle is inserted and rotated. The sample (approximately 8-10 grams of resin) is heated to the required temperature until the molten sample is about 1 inch below the top of the sample chamber. Lower viscometer device and sink spindle into sample chamber. Continue to lower until the viscometer bracket is aligned on the Thermosel. The viscometer is activated and set to operate at a shear rate resulting in a torque measurement of 40-60 percent of the total torque capacity based on the viscometer RPM output. Measure the measurement every minute, about 15 minutes, or until the value is stable, at which point the final measurement is recorded.

Experiment I. Polymers The polymers used in this study are shown in Table 1 below. The polymer is generally stabilized with one or more antioxidants and / or other stabilizers.

II. Bonding layer composition and preparation (HAAKE Bow blend)
The composition was prepared on “50 cc HAAKE Bow”. All ingredients were added to HAAKE Bow at 190 ° C. and mixed for 7 minutes at 50 RPM while purging with nitrogen. The compositions and films are shown in Tables 2-5. The amount is in weight percent based on the total weight of the polymer composition.

III. 1-PET Plaque Injection Molding Poly (ethylene terephthalate) (PET) resin (ADN5001, available from Andenee, IV approx. 0.8 dl / g (ASTM D5225), Tm ≧ 245 ° C. (WN-B010-7089E)) It was injection-molded into a 4 inch × 6 inch × 0.125 inch thick plaque (melting temperature = 277 ° C., molding temperature = 20 ° C., injection speed = 200 mm / second, holding pressure = 5.52 MPa).

III. 2—Compression Molding of Bonding Layer Composition Films Each bonding layer composition was compression molded into a film at 190 ° C. under a pressure of 40,000 psi for 4 minutes using a “55 mil” thick chase. . The sample dimensions were “4 inches × 6 inches × 55 mils thick”.

III. 3-Preparation of test sample (PET / binding layer sandwich)
Sandwiches of PET and each tie layer coating were made using a manual press. The top plate of the manual press was heated to 260 ° C and the bottom plate was kept at 23 ° C. PET plaque (0.125 inches thick), tie layer coating (55 mils thick), "4 inches wide x 1 inch long" piece of TEFLON coating (available from DuPont), and "4 inches x 6" All "inch" MYLAR coatings (available from DuPont) were washed with acetone. One MYLAR coating (external coating) covered the entire surface area of the plaque assembly. A piece of TEFLON film (4 inches x 1 inch) was inserted between the PET plaque and the tie layer to function as a release layer to initiate the adhesion test. Two chases, one “4” × 6 ”× 0.125 inch thick” and the other “31 mils thick”, were deposited on top of each other (tie layer thickness 55 mils). ). In FIG. 2, the TEFLON coating is partially located between the tie layer and the PET plaque and is represented by a light gray line. A plaque assembly sandwich (PET plaque / TEFLON coating / bonding layer / MYLAR coating) was placed between the two chases and the final assembly was placed on the cold plate of a manual press. The press was raised to a pressure of 1,000 psi for 5 minutes and then to 3,000 psi for 3 minutes. Each plaque assembly was cooled on the bench top at ambient conditions. Next, a cut (1/2 inch wide) of each plaque assembly was cut from the compression molded assembly.

III. 4—Adhesion Strength Measurement As described above, each compression molded plaque assembly was subjected to an adhesion test in order to test the adhesion of the tie layer to PET plaque. The adhesion was measured with the “90 degree peel” setting as shown in FIG. A piece of plaque (1/2 inch wide) was used as a test sample. At least one “1 inch ear” of the tie layer was secured in the upper air grip while a rigid PET plaque was secured with screws and double-sided tape. Both the PET plaque and the tie layer were pulled at 0.3 mm / sec. For each tie layer composition, 5 slices were tested and the average peel strength was reported (both in kgf and N / mm).

IV. Adhesion Tests and Results Comparative Films As shown in Table 2, films containing straight BYNEL 3860, LOTADAR 28MA07, and OREVAC 9304 tie layer compositions show good to moderate adhesion to PET, but such compositions Products (“vinyl acetate containing” and “acrylate containing”) are generally not preferred due to lower thermal stability and / or taste and / or odor problems at high processing temperatures (eg, 225 ° C. and above). Films containing straight EEA, MAH-g-EO, MAH-g-HDPE, and EO200 showed lower adhesion to PET.

Film containing a tie layer containing EO200 and MAH-g-EO:
Table 3 shows the adhesion results for tie layer compositions containing EO200 and MAH-g-EO. As shown in Table 3, all of the coatings according to the present invention had excellent adhesion results. While film L containing a tie layer composition containing 100 wt% EO200 had very low adhesion to PET, the film according to the present invention had high adhesion to PET.

Films containing tie layers containing EO200 and MAH-g-HDPE Table 4 shows the adhesion results for tie layer compositions containing EO200 and MAH-g-HDPE. As shown in Table 4, all of the coatings according to the present invention had excellent adhesion results. Films according to the present invention showed comparable or better adhesion compared to films containing BYNEL 3860 or OREVAC 9304 (see Table 2).

Films containing tie layers containing various PE and MAH-g-EO Table 5 shows the adhesion of tie layer compositions containing various ethylene-based polymers and MAH-g-EO. As shown in Table 5, all of the coatings according to the present invention had excellent adhesion results. Coatings 11-13 showed significantly better adhesion than the comparative coatings BYNEL 3860 and OREVAC 9304 (see Table 2).

V. Summary of Results Films according to the present invention containing a tie layer composition containing an ethylene / alpha olefin polymer and a MAH functionalized ethylene-based polymer are generally superior to PET substrates compared to the comparative films tested. It had the adhesiveness which was made. High adhesion is important in meeting the required requirements for stringent adhesion, such as post-processing applications such as thermoforming. Also, the coating according to the present invention should not suffer from taste and odor problems. While the comparative coating containing the binding composition containing 100 weight percent ethylene / alpha olefin polymer had very low adhesion to PET, the coating according to the present invention had high adhesion to PET Please note that. Bond composition in which the coating according to the invention containing a homogeneously branched polymer, and preferably a binder composition each containing a homogeneously branched substantially linear polymer, contains a heterogeneously branched polymer. Note also that it had better adhesion than the film containing the object.

The excellent adhesive properties found in the coatings according to the present invention are desirable in co-extruded coatings and exhibit good adhesion in the co-extruded coatings. These beneficial adhesive properties are multilayer coatings, for example, where the structure is ABC, or ABDBC, A = PET or PLA, B = bonding layer, C = olefinic polymer, and D = polyamide or EVOH copolymer. It will also be found in the coextrusion process.

Claims (12)

A coating comprising at least two layers of a first layer and a second layer,
The first layer is formed from a first composition comprising polyester, polylactic acid (PLA), or a combination thereof;
The second layer comprises at least A) a functionalized ethylene-based polymer,
B) an ethylene / alphaolefin interpolymer and formed from a second composition,
The first layer is a coating adjacent to the second layer.   The coating of claim 1 wherein the ethylene / alpha olefin interpolymer of component B (second composition) has a density of less than 0.93 g / cc.   The coating of claim 1 or 2, wherein the second composition comprises less than 60 weight percent of the functionalized ethylene-based polymer of component A, based on the total weight of component A and component B.   4. The method according to claim 1, wherein the second composition comprises 80 weight percent or less of the functionalized ethylene-based polymer (second composition) based on the total weight of component A and component B. 5. The film according to crab.   The coating according to any of claims 1 to 4, wherein the functionalized ethylene-based polymer is selected from a functionalized ethylene homopolymer or a functionalized ethylene / alphaolefin interpolymer.   The film according to any one of claims 1 to 5, wherein the functionalized ethylene-based polymer is a polymer subjected to MAH grafting.   The coating of claim 6, wherein the MAH graft level is 0.05 to 1.20 weight percent, based on the weight of the second composition.   The film according to any one of claims 1 to 7, wherein the second composition contains 90% by weight or more of the "total weight of components A and B" based on the weight of the second composition.   The coating according to any of claims 1 to 8, wherein the ethylene / alpha-olefin interpolymer of component B (second composition) has a melting point (Tm) of less than 85 ° C as determined by DSC.   The film according to any one of claims 1 to 9, wherein the weight ratio of component B to component A is 99: 1 to 10:90.   11. A coating according to any of claims 1 to 10, wherein the second composition further comprises Component C which is an ethylene / alphaolefin interpolymer having a melt viscosity of 50,000 cP or less at 350 <0> F. An article comprising the coating according to any one of claims 1 to 11.